Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Door worked, 2 hours later didn't- just hummed good weather

Door went up and down yesterday after work, however went to use again last evening a few hours later and it just hums and doesn't lift the door. Verified the connections and nothing was in the way of the sensors, track, or disengaged. Craftsman 1/2 hp installed in Spring 1999.

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If it just hums when a button is pressed it could be the start capacitor. This sits next to the motor and is about 5 inches long and about as big around as a silver dollar.

Posted on May 06, 2010

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Posted on Jan 02, 2017

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